Shell Offshore Inc. reported production from all wells that flow to its Brutus platform, about 90 miles south of Timbalier Island, Louisiana, had been shut off, said officials at the Bureau of Safety and Environmental Enforcement, which is part of the U.S. Interior Department.

There were no injuries or evacuations reported, the safety bureau said.

Shell said Thursday night a company helicopter spotted the sheen near its Glider subsea system at the Brutus platform. No drilling occurs at the site, which is an underwater pipe system that connects to a central hub, the company said.

“No release is acceptable, and safety remains our priority as we respond to this incident,” Shell said.

Brutus began operation in 2001 and was designed with top capacity of 100,000 barrels of oil and 150 million cubic feet (4.25 million cubic meters) of gas per day.